checkpoint

Shogi.Api/Application/ShogiApplication.cs

@@ -129,4 +129,38 @@ public class ShogiApplication(
 
 		return userManager.Users.FirstOrDefault(u => u.Id == userId)?.UserName!;
 	}
+
+	public async Task<IActionResult> ReadSessionSnapshots(string sessionId)
+	{
+		var session = this.ReadSession(sessionId);
+		if (session == null)
+		{
+			return new NotFoundResult();
+		}
+
+		var snapshots = await queryRepository.ReadSessionSnapshots(sessionId);
+
+		var boardStates = snapshots.Select(snap => new Contracts.Types.BoardState
+		{
+			Board = snap.Board.ToDictionary(
+				kvp => kvp.Key,
+				kvp => kvp.Value == null
+					? null
+					: new Contracts.Types.Piece
+					{
+						IsPromoted = kvp.Value.IsPromoted,
+						Owner = (Contracts.Types.WhichPlayer)kvp.Value.Owner,
+						WhichPiece = (Contracts.Types.WhichPiece)kvp.Value.WhichPiece,
+					}),
+			Player1Hand = snap.Player1Hand.Cast<Contracts.Types.WhichPiece>().ToArray(),
+			Player2Hand = snap.Player2Hand.Cast<Contracts.Types.WhichPiece>().ToArray(),
+			PlayerInCheck = snap.PlayerInCheck == null ? null : (Contracts.Types.WhichPlayer)snap.PlayerInCheck,
+			Victor = snap.IsGameOver
+				? snap.PlayerInCheck == Repositories.Dto.SessionState.WhichPlayer.Player1 ? Contracts.Types.WhichPlayer.Player2 : Contracts.Types.WhichPlayer.Player1
+				: null,
+			WhoseTurn = (Contracts.Types.WhichPlayer)snap.WhoseTurn,
+		});
+
+		return new OkObjectResult(boardStates.ToArray());
+	}
 }